Creates a new Language::Homespring::Visualise::GraphViz object. The single hash argument contains initialisation info. The only key currently required is 'interp', which should point to the Language::Homespring object you wish to visualise.

Important: If the font file cannot be found (for "Times", "Times.ttf" must be in the font seach path - remember case sensitivity on unix etc.) then a built in font will be used, BUT the labels will not be centered in the nodes.

The examples folder in this distribution contains an example script (example.pl) and three example GIFs. The GIFs are visual representations of the .hs files of the same name from the Language::Homespring distribution.